I couldn't use ANY of my soldered -banana or spade - cables!
Using raw braided cable is a pain but I did peruse some options if you have unterminated cables that are too big for your spring connectors:
1. Solid Pin connectors - Not recommended !
Not a great connection in that they can be pulled out easily and MUST avoid ones designed to "break off to fit".
2. Tributaries Soft Pins or Viablue Flexible Pins (Monster also makes a cheaper version)
These are more interesting. The "pin" portion is "soft" braided cable instead of being thin hard metal and makes a solid connection that won't spin in the amp. The Tributaries can take up to 12 awg cable; not sure how big the ViaBlue can handle. Neither helps if your cables are terminated with something and unfortunately nether is cheap - though both are really well made, especially the ViaBlue.
The Tributaries Soft Pins are hard to find - I can't even find a good image online. Basically contact your local McIntosh dealer and ask for them. Tributaries and McIntosh are loosely related and Soft Pins were designed to mate modern cables to vintage McIntosh amps. They look like a more DIY version of the below ViaBlues:
I first saw the ViaBlue in Japan but found them here at Ram ($30+ for 4).
In Japan I saw the even sexier T6 version:
The fancy pin connectors didn't help me as all my cables were soldered/terminated and them plugs and spades are too costly to snip off!
I ended up selling a pair of fancy speaker cables and buying bulk Nordost Flatline cable - great stuff!
It's not that easy to find bulk/unterminated, but your local Nordost dealer should have bulk for sale by the foot for $5.00/foot.
It's thin, flat, extruded solid copper so it's light, near indestructible and easy to hide - even under carpets.
After stripping I bend the ends into a "pin" with a "lip" to make a secure connection in my Pioneer SA-7100.
Cables hides nicely behind the vintage Linn Kan stands:
I have a Pioneer SA-7100 and posted this on this thread in Oct. The Nordost Flatline will solve your problems if you want a flexible cable that works with vintage Pioneer connectors. Otherwise get the soft type pin connectors. BJ Cables has a explanation of why the rigid pin connectors can cause problems.